Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ae943ab2790fc9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-15 05:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10472bbd2616c97ee9ac0122d325b41c SHA-1: f47de54d73c680438757be60590af22ee778eece SHA-256: 65ae943ab2790fc935338a089c8c20a34ff1c348ba9f29e0dcfa911ae95957d2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is a known malicious domain. Additionally, a heuristic indicates a browser extension installation lure, suggesting a social engineering attempt to trick the user into installing malicious software. The document also contains a large number of external PDF links, many of which point to Shopify domains, potentially as part of a link farm to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=google%20docs%20pdf%20editor
    • http://bonag.spectrumpilotservices.com/uploads/1/3/0/8/130874368/jolunazewedato_kijozukuduw.pdf
    • http://files.goldenartistsentertainment.com/uploads/1/3/1/4/131452821/laruzudekogeg.pdf
    • http://files.trailbalzingamstaffs.net/uploads/1/3/1/4/131453267/294e9148fe94b7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8488/1827/files/66239852948.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/gozopuvupalorarigisod.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/22846146785.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/sistemas_de_bases_de_datos_distribuidas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/zuzulasur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/tratamiento_para_vejiga_neurogenica.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/88490508210.pdf
    • https://cdn.shopify.com/s/files/1/0436/8960/7321/files/beatless_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0903/files/bulkhead_transformers_robots_in_disguise.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/51444691768.pdf
    • https://cdn.shopify.com/s/files/1/0435/3150/1720/files/armor_bearer_duties.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c5.bin
ec52810982711437c6634d1ca70d117bc7f677aedccf8e4005a95112401fd2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 5144 bytes
font_01_sfnt_off00007463.bin
f530a5670bbb57f64cd85847fdaa50c1d5e4e95df747b8f7e35c12b9b8298623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7463 10392 bytes

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